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经营范围
发明名称
Air valve
摘要
申请公布号
US2488456(A)
申请公布日期
1949.11.15
申请号
US19470786442
申请日期
1947.11.17
申请人
DUNCAN WALKER ALEXANDER;EARL DREW JOHN
发明人
WALKER ALEXANDER DUNCAN;DREW JOHN EARL
分类号
F16K15/20
主分类号
F16K15/20
代理机构
代理人
主权项
地址
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